/**
 * @license
 * Copyright 2019 Google Inc.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

export type AnyConstructor<T> = {
  new (...args: any[]): T;
};

export type MixinConstructor<TMixin, TBase> = [TMixin, TBase] extends [
  new (...a: infer O1) => infer R1,
  new (...b: any[]) => infer R2,
]
  ? { new (...a: O1): R1 & R2 } & Pick<TMixin, keyof TMixin> &
      Pick<TBase, keyof TBase>
  : never;
